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need more heat

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pzzld4me
pzzld4me Member Posts: 2
edited February 2023 in THE MAIN WALL
I had a boiler in the garage that worked well for 15 years. Last year three boiler guys could not fix it. The last one said too much sediment baked in the Botton of the boiler. I decided to instal a new boiler, moving it to the basement. The old system had two Taco 007-F5 circulators. The new one was installed with only one of the Taco 007-F5s Seven thermostats are replaced with one. We are heating 6 rooms. Two rooms get properly heated. Four of the rooms only reach to within 15-20 degrees of the needed temperature. I have about 120 feet of 3/4 inch copper The radiators are about 160 feet long.
I need help. Thank you.
we get heat in two rooms

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  • bburd
    bburd Member Posts: 933
    edited February 2023
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    If you have 160 feet of finned baseboard element connected in one 3/4" loop, that's your problem. A 3/4" pipe can transfer about 40,000 BTU of heat at the usual 20° temperature difference between supply and return, and the far end won't be as hot as the near end so the baseboard should to be sized to compensate. That's at a flow rate of 4 gallons per minute.

    Larger systems are broken up into several loops, even if only one zone, and fed from larger supply piping before the split for this reason.

    Bburd
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,166
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    pzzld4me said:

    I had a boiler in the garage that worked well for 15 years. Last year three boiler guys could not fix it. The last one said too much sediment baked in the Botton of the boiler. I decided to instal a new boiler, moving it to the basement.

    How much additional piping was added to make this move?
    pzzld4me said:

    The old system had two Taco 007-F5 circulators. The new one was installed with only one of the Taco 007-F5s

    . What controlled the second circulator on the old boiler?
    pzzld4me said:

    Seven thermostats are replaced with one.

    What did the other 6thermostats operate? Were there zone valves involved?
    pzzld4me said:

    We are heating 6 rooms. Two rooms get properly heated.

    How are these connected to the boiler? are they the first 2 rooms on a single loop?
    pzzld4me said:

    Four of the rooms only reach to within 15-20 degrees of the needed temperature.

    Were these rooms just added to the end of the first two rooms in a series loop? That will not work.
    pzzld4me said:

    I have about 120 feet of 3/4 inch copper The radiators are about 160 feet long.
    I need help. Thank you.

    You will find the reason for your problem in this book on page 4. https://documentlibrary.xylemappliedwater.com/wp-content/blogs.dir/22/files/2020/01/FH-Z100B-BG-Zoning-Made-Easy-2.pdf

    Once you read the first 6 pages of this book, you will be able to answer these test questions:

    Once you can answer these questions you will have the answer to your question.

    My question to you is: Who installed the new boiler? If the installer was a professional, then they need to read the book and answer the questions.









    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    GGrossMikeAmann
  • hot_rod
    hot_rod Member Posts: 22,472
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    Is the new boiler supplying the same temperature?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Steamhead
    Steamhead Member Posts: 17,006
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    @pzzld4me , where are you located?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,835
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    If it worked before why did they screw it all up?
  • pzzld4me
    pzzld4me Member Posts: 2
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    It was difficult getting somebody to install boiler heat. Moving from garage to basement added no length to the line. But why go from two to one Taco 007-F5 circulators?
    MikeAmann